Préparation de films plastiques antibactériens à base d'extrait d'ortie et étude de leur rétention et de leurs propriétés biologiques en vue de leur utilisation dans l'emballage

Abstract

Plastic packaging is one of the most important areas of industry, especially plastic food packaging, which can adversely affect the quality of food and the preservation or release of molecules harmful to human health. With this in mind, we decided to manufacture a biodegradable, antimicrobial film based on a fermented extract of a spontaneous plant, the nettle, known for its antibacterial properties, in order to ensure the plastic's resistance, we synthesized polystyrene by radical route and then integrated it at a rate of 30% by mass with the starch in a plastic. In order to reveal the antimicrobial character of the fermented nettle extract, a comparative biological study of starch-based plastics and PS/starch based on fermented nettle extract gave a very good result for the starch-based plastic (100%). A retention study revealed that the starch-based plastic did not have a good retention rate when compared to the starch-based plastic extracted from nettles. A rheological study revealed that the 100% starch-based plastic should be reinforced for subsequent use in packaging. The results obtained from this work are satisfactory and we plan to improve it in the future.